Home / 8,105.13-12,138.10-6,708.18

Finding the Fourth Proportional to 8,105.13, 12,138.10 and 6,708.18

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Solution

The fourth proportional to 8,105.13, 12,138.10 and 6,708.18 is: 10,046.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,105.13 : 12,138.10 = 6,708.18 : x
  2. Step 2: Convert to fraction form
    8,105.13/12,138.10 = 6,708.18/x
  3. Step 3: Cross multiply
    8,105.13x = 12,138.10 × 6,708.18
  4. Step 4: Simplify right side
    8,105.13x = 81,424,559.66
  5. Step 5: Solve for x
    x = 81,424,559.66/8,105.13
  6. Step 6: Final answer
    x = 10,046.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.